Description Experience the same luminous glow found in the Glow Fobs, with our lightweight and cost-effective Ember fob. This fob can be attached to your keychain or any zipper on your gear, such as a backpack, range bag, tent or sleeping bag.Like its metal cousins, the Ember can be connected to your keychain, or any zipper on your range bag, backpack, sleeping bag, or tent. Tritium is self-powered and self-reliant, just like you. It doesn't require an outside charge and has a half-life of 12.23 years. Invest in the Ember for yourself and for your loved ones.